debug statements to help find lighting problem

panda/src/glgsg/glGraphicsStateGuardian.I

@@ -1037,23 +1037,7 @@ get_current_alpha_scale() const {
 ////////////////////////////////////////////////////////////////////
 INLINE GLenum GLGraphicsStateGuardian::get_light_id(int index) const
 {
-    switch( index )
-    {
-        case 0: return GL_LIGHT0;
-        case 1: return GL_LIGHT1;
-        case 2: return GL_LIGHT2;
-        case 3: return GL_LIGHT3;
-        case 4: return GL_LIGHT4;
-        case 5: return GL_LIGHT5;
-        case 6: return GL_LIGHT6;
-        case 7: return GL_LIGHT7;
-        default:
-            glgsg_cat.error()
-              << "get_light_id() - we don't currently support ids "
-              << "> 8" << endl;
-            break;
-    }
-    return GL_LIGHT0;
+  return GL_LIGHT0 + index;
 }
 
 ////////////////////////////////////////////////////////////////////

panda/src/glgsg/glGraphicsStateGuardian.cxx

@@ -291,6 +291,8 @@ reset() {
   GLint max_lights;
   glGetIntegerv(GL_MAX_LIGHTS, &max_lights);
   init_lights(max_lights);
+  glgsg_cat.debug()
+    << "max_lights = " << max_lights << "\n";
 
   // Set up the clip plane id map
   GLint max_clip_planes;
@@ -3319,6 +3321,10 @@ issue_depth_offset(const DepthOffsetAttrib *attrib) {
 ////////////////////////////////////////////////////////////////////
 void GLGraphicsStateGuardian::
 bind_light(PointLight *light, int light_id) {
+  if (glgsg_cat.is_debug()) {
+    glgsg_cat.debug()
+      << "bind_light(PointLight, " << light_id << ")\n";
+  }
   GLenum id = get_light_id(light_id);
   static const Colorf black(0.0f, 0.0f, 0.0f, 1.0f);
   glLightfv(id, GL_AMBIENT, black.get_data());
@@ -3360,6 +3366,10 @@ bind_light(PointLight *light, int light_id) {
 ////////////////////////////////////////////////////////////////////
 void GLGraphicsStateGuardian::
 bind_light(DirectionalLight *light, int light_id) {
+  if (glgsg_cat.is_debug()) {
+    glgsg_cat.debug()
+      << "bind_light(DirectionalLight, " << light_id << ")\n";
+  }
   GLenum id = get_light_id( light_id );
   static const Colorf black(0.0f, 0.0f, 0.0f, 1.0f);
   glLightfv(id, GL_AMBIENT, black.get_data());
@@ -3402,6 +3412,10 @@ bind_light(DirectionalLight *light, int light_id) {
 ////////////////////////////////////////////////////////////////////
 void GLGraphicsStateGuardian::
 bind_light(Spotlight *light, int light_id) {
+  if (glgsg_cat.is_debug()) {
+    glgsg_cat.debug()
+      << "bind_light(Spotlight, " << light_id << ")\n";
+  }
   Lens *lens = light->get_lens();
   nassertv(lens != (Lens *)NULL);